JPH01108689U - - Google Patents
Info
- Publication number
- JPH01108689U JPH01108689U JP452488U JP452488U JPH01108689U JP H01108689 U JPH01108689 U JP H01108689U JP 452488 U JP452488 U JP 452488U JP 452488 U JP452488 U JP 452488U JP H01108689 U JPH01108689 U JP H01108689U
- Authority
- JP
- Japan
- Prior art keywords
- input
- amplifier
- output
- external terminal
- catv system
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000010586 diagram Methods 0.000 description 4
Landscapes
- Details Of Television Systems (AREA)
- Testing, Inspecting, Measuring Of Stereoscopic Televisions And Televisions (AREA)
Description
第１図は本考案の一実施例を示した回路ブロツ
ク図；第２図は第１図のヘツドエンド装置と予備
装置の外観を示した説明図；第３，４図は本考案
の他の実施例を示した回路ブロツク図；第５図は
従来例を示した回路ブロツク図である。
１：ヘツドエンド装置、２：共用受信アンテナ
、２ａ：ＶＨＦローチヤンネル受信アンテナ、２
ｂ：ＶＨＦハイチヤンネル受信アンテナ、２ｃ：
ＵＨＦ受信アンテナ、２ｄ：ＢＳ受信アンテナ、
３：入力分配器、４ａ〜４ｎ：チヤンネルアンプ
、５：出力合成器、６：同軸ケーブル線路、７ａ
〜７ｎ：入力サービス切換スイツチ、８：第１の
外部端子、９ａ〜９ｎ：出力サービス切換スイツ
チ、１０：第２の外部端子、１２：予備装置、１
４ａ〜１４ｎ：チヤンネルアンプ（予備アンプ）
、１５：入力コネクタ端子、１６：出力コネクタ
端子、１７，１９：筐体、１８ａ〜１８ｏ，２０
ａ〜２０ｋ：ラツク、２１：台車、２２ａ，２４
ａ：ＶＨＦハイチヤンネルアンプ、２２ｂ，２４
ｂ：ＶＨＦローチヤンネルアンプ、２２ｃ，２４
ｃ：ＵＨＦアンプ、２２ｄ，２４ｄ：ＢＳ―ＩＦ
アンプ、２５：ブースタ装置、２６，２８：ブー
スタ。
Fig. 1 is a circuit block diagram showing one embodiment of the present invention; Fig. 2 is an explanatory diagram showing the external appearance of the head end device and standby device in Fig. 1; Figs. 3 and 4 are other embodiments of the present invention. Circuit block diagram showing an example; FIG. 5 is a circuit block diagram showing a conventional example. 1: Head end device, 2: Shared receiving antenna, 2a: VHF low channel receiving antenna, 2
b: VHF Haiti channel receiving antenna, 2c:
UHF receiving antenna, 2d: BS receiving antenna,
3: Input distributor, 4a to 4n: Channel amplifier, 5: Output combiner, 6: Coaxial cable line, 7a
~7n: Input service changeover switch, 8: First external terminal, 9a~9n: Output service changeover switch, 10: Second external terminal, 12: Spare device, 1
4a to 14n: Channel amplifier (spare amplifier)
, 15: Input connector terminal, 16: Output connector terminal, 17, 19: Housing, 18a to 18o, 20
a~20k: rack, 21: trolley, 22a, 24
a: VHF Haiti channel amplifier, 22b, 24
b: VHF low channel amplifier, 22c, 24
c: UHF amplifier, 22d, 24d: BS-IF
Amplifier, 25: Booster device, 26, 28: Booster.
Claims (1)
けてアンプで増幅した後に出力合成器で合成して
同軸ケーブル線路に送出するＣＡＴＶシステムの
ヘツドエンド装置に於いて、 前記アンプに対する入力テレビ信号を該アンプ
入力と第１の外部端子に切換える入力サービス切
換スイツチと、前記前記出力合成器の入力を前記
アンプの出力と第２の外部端子に切換える出力サ
ービス切換スイツチとを設け、 前記第１の外部端子に可搬自在な予備装置に設
けた予備アンプの入力を接続すると共に前記第２
の外部端子に前記予備アンプの出力を接続した後
に前記入力サービス切換スイツチ及び出力サービ
ス切換スイツチを外部端子側に切換えるようにし
たことを特徴とするＣＡＴＶシステムのヘツドエ
ンド装置。[Scope of Claim for Utility Model Registration] In a head-end device of a CATV system that divides a television signal received by an antenna into predetermined bands and amplifies it with an amplifier, synthesizes it with an output combiner, and sends it out to a coaxial cable line, an input service switching switch for switching an input television signal to the amplifier input and a first external terminal; and an output service switching switch for switching the input of the output combiner to the output of the amplifier and a second external terminal; The input of a standby amplifier provided in a portable standby device is connected to the first external terminal, and the second
1. A head end device for a CATV system, wherein the input service changeover switch and the output service changeover switch are switched to the external terminal side after the output of the standby amplifier is connected to the external terminal of the CATV system.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP452488U JPH01108689U (en) | 1988-01-18 | 1988-01-18 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP452488U JPH01108689U (en) | 1988-01-18 | 1988-01-18 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH01108689U true JPH01108689U (en) | 1989-07-24 |
Family
ID=31207111
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP452488U Pending JPH01108689U (en) | 1988-01-18 | 1988-01-18 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH01108689U (en) |
-
1988
- 1988-01-18 JP JP452488U patent/JPH01108689U/ja active Pending
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